Electric time-alarm.



No. 659,725 Patented Oct. 16, I900. S. WOLF.

ELECTRIC TIME ALARM.

(Application filed Feb. 7, 1900.}

2 Sheets-Sheet I.

(No Model.)

No. 659,725: Patented Oct. 16, I900.

S. WOLF.

ELECTRIC TIME ALARM.

(Appliclt'mn filed-Feb. '7, 1900.)

(No Model.) 2 Sheets-Sheet 2.

UNITED STATES PATENT OFFICE.

SIMON WOLF, OF ESSEN, GERMANY.

ELECTRIC TIME-ALARM.

SPECIFICATION forming part of Letters Patent No. 659,725, dated October 16, 1900.

Application filed February 7, 1900. Serial No. 4,310. (No model.)

To all whom it may concern:

Be it known that I, SIMON WVOLF, a citizen of Germany, and a resident of Essen, Germany, have invented certain new and useful Improvements in or Connected with Clock- Alarms for Bedrooms, of which the following is a specification.

This invention relates to an alarm apparatus which when set in operation at a predetermined time for waking up a person lying in bed will continue to work until the said person has left the bed.

In the accompanying drawings, Figure 1 is an elevation of an alarm apparatus embodying my invention,with a partial section of the bed to which it is applied. Fig. 2 is a partial section of the alarm-clock, and Fig. 3 is a diagram illustrating the method of operation.

The frame 0" of the mattress or couch is supported by springs f, arranged so that they yield when the mattress has to carry the weight of a person. Underneath the free ends of the springs are mounted metallic contacts 8, (one for each spring,) which are connected by parallel conductors with one of the two main conducting-wires supplying the electric current. As is usual with electric clock-alarms, the electric circuit passes also through the clock 22, where it can be closed and opened by the motion of the small clockhand, which in the present example is designated with the letter 2' and serves as the movable contact-piece, While the stationary but adjustable contact-piece is a separate index-hand 0, adapted to be turned by hand on the axis of the dial. The adjustable clockhand a is provided with a pin (I, placed in the way of the small clock-hand z. If the bedcontact is closed, the alarm-bell g, inserted in the alarm-circuit, will begin to ring as soon as the hand a touches the contact-pin a, and as the hand 0 is adapted to turn on the axle of the hand 2 (but is.insulated from the same) the hand a will carry the hand 0 with it and keep the alarm-circuit closed until it is interrupted by the motion of the springsf when the person leaves the bed.

The same alarm-clock may be connected with two or more beds, in which case the clock has two or more independently movable and adjustable contact-hands c. The example represented by Figs. 1 and 2 has two hands 0, connected with two independent alarm-circuits. Instead of using the small hand .2 directly as the movable contact it may be provided with a contact-spring, while the fixed ends of the springs are connected by parallel conductors with the other main conducting-wire, as shown by Fig. 3. The electric circuit is completed by the bed as soon as one or more of the springsf are brought in contact with one or more of the stationary metallic contact-pins s by the weight of the person lying in bed.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, I declare that what I claim is An alarm composed of a bed, a mattressframe, a contactspring for yieldingly supporting said frame, a contact on the bed beneath the spring, an alarm in circuit, and means for setting the alarm, substantially as specified.

SIMON XVOLF.

Witnesses:

WM. EssENwEIN, T. LIEBER. 

